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We update the ground-state energy ratio of unitary Fermi gas tononinteracting Fermi gas (xi) from the epsilon expansion by including thenext-to-next-to-leading-order (NNLO) term near two spatial dimensions.Interpolations of the NNLO epsilon expansions around four and two spatialdimensions with the use of Pade approximants give xi=0.360+/-0.020 in threedimensions with the uncertainty due to different interpolation functions. Thisvalue is consistent with the previous interpolations of the NLO epsilonexpansions xi=0.377+/-0.014 in spite of the large NNLO corrections.

Ground-state energy of the unitary Fermi gas from the epsilon expansion